What really destroyed the Maya civilization?

One of the biggest debates in archaeology is what destroyed the extensive, highly-advanced Maya civilization 1,000 years ago. It's known that the empire went through a long collapse from roughly 800 to 1,000, leaving behind a network of pyramids and monumental architecture in the Yucatán jungles. But why? We have… » 2/24/12 12:00pm 2/24/12 12:00pm